4. Cellular respiration is balanced by photosynthesis; the two processes work together to maintain the cycling of carbon and oxygen among Earth systems.
What describes the roles of carbon dioxide and water in these two processes?
a. Carbon dioxide and water are the reactants of both processes.
b. Carbon dioxide and water are the products of both processes.
c. Carbon dioxide is a reactant of photosynthesis; water is a reactant of cellular
respiration
d. Carbon dioxide and water are the reactants of photosynthesis and the
products of cellular respiration.

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases